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Finding the Fourth Proportional to 558.80, 771.36 and 500.48

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Solution

The fourth proportional to 558.80, 771.36 and 500.48 is: 690.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.80 : 771.36 = 500.48 : x
  2. Step 2: Convert to fraction form
    558.80/771.36 = 500.48/x
  3. Step 3: Cross multiply
    558.80x = 771.36 × 500.48
  4. Step 4: Simplify right side
    558.80x = 386,050.25
  5. Step 5: Solve for x
    x = 386,050.25/558.80
  6. Step 6: Final answer
    x = 690.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.